GEODETIC NETWORK AND GEOID MODEL OF MONGOLIA

摘要

This paper outlines the geodetic network, transformation parameters and Geoid height model of the Mongolia. State, local and GPS coordinate systems which have been used in Mongolia since the 1950s. The primary GPS network of Mongolia was established in 1997-1998, adjustment of this network was performed in cooperation with National Land Survey /NLS/ of Sweden in 2000. 2D and 3D transformation parameter between State and GPS coordinate system, local and GPS coordinate system were calculated with an accuracy of 1-2 m, 30 cm accordingly. The geoid height model was produced based on the 2004-5 airborne gravity survey, surface gravimetry from various sources, and detailed digital terrain models from satellite radar interferometry (SRTM). Transformation parameters and geoid height model are used in different organizations to convert spatial database and digital data produced in state or local coordinate systems into GPS coordinate system.